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Bitter Orange Marmalade
Soak the orange seeds over night in cold water to cover, let cook about an hour, drain off all the water, and add it to the prepared fruit before cooking.
I pineapple 4 oranges I lemon
This is a fragment: an ingredient list and one technique note, with no sugar quantity, no cooking time and no instruction for sealing the jars. The technique it does record — extracting pectin from the seeds — is the part worth keeping.
- The hinge: the seed waterCitrus seeds and membranes are the richest source of pectin in the fruit. Soaking them overnight and then simmering an hour draws that pectin into the water, which is then added to the fruit as the setting agent. Tie the seeds in muslin and you can lift them out cleanly rather than straining.
- Bitter orangesThe title means Seville-type sour oranges, in season roughly January to February and rarely stocked outside that window. Sweet navels or Valencias will not give the same flavor; sour oranges from a Latin or Caribbean grocer are the closest substitute.
- No sugar quantity is givenThe original omits it entirely. Preserving practice of the period was to weigh the prepared fruit and pulp and use an equal weight of sugar, or three-quarters weight for a softer, less sweet set. That is the convention behind a recipe like this, not a figure stated in it.
- PineappleOne pineapple means a whole fresh fruit, peeled and cored, perhaps 1 1/2 to 2 lb of usable flesh. Bromelain, the enzyme in fresh pineapple, acts on protein rather than pectin, so it is no obstacle to a marmalade set in any case. Canned pineapple in syrup will throw the sugar balance off.
- Judging the setCook the fruit and sugar to 220F (104C) at sea level, or until a spoonful chilled on a cold plate wrinkles when pushed. The original gives no time because time is not the variable that matters.
- Peel firstBitter orange and lemon peel needs to be simmered until fully tender before sugar goes in. Sugar sets the peel and it will stay leathery no matter how long you boil it afterward.
- SealingNo processing instruction appears here. For shelf storage, follow current tested water-bath directions for citrus marmalade; otherwise treat it as a refrigerator preserve and use it within a month.
- YieldFour oranges, a lemon and a pineapple with sugar to match will fill a fair number of half-pint jars; the exact count depends on the size of the fruit and how far the mixture is boiled down.
Marmalade in the English sense — a sliced-peel citrus preserve — is bound up with the bitter Seville orange, whose short winter season and high pectin content made it the standard preserving fruit long before commercial pectin was sold. The seed-water instruction is the interesting survival: it is a working cook's grasp of pectin chemistry from before pectin had a household name, and it is why this entry is written as a note on technique rather than a full recipe — a trick set down for readers presumed to know the fruit-to-sugar rule by weight already.